Want to change 2.4ghz channel to 11 permanently but cannot access myfiosgateway settings

[Questionsonwifi]

Hello,

When I try to change the settings on my 2.4ghz channel via myfiosgateway.com or 192.168.1.1, I have no option to do so. I can only change basic things like my wifi network name and password, and enabling the 6ghz band, etc. How can I access the advanced features of the router to change the 2.4ghz channel permanently, etc.? I have a CR1000a router.